Improvement in sawing-machines



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RICHARD'ATKINSON,` or CLEVELAND, OHIO.

A Letters Patent No. 85,894, dated .Tarma/ry 19, 1.869.

IMPROVEMENT IN SAW'INGMACHINES.

The Schedule referred to LLthese LettersA Patent and making part of the same.

To all whom 'it lmel/y conce/m Be it known that I, RICHARD Armeen, of Cleveland, in the county of Cuyahoga, and State of Ohio, have invented a certain new and improved Sawing- Machine, the object of which is to facilitate the adjustment of` the saw, pulley-shaft, and table; and it consists in the use of a screw-rod having diii'erential threads upon it, and operating in different nuts, to make the vadjustl'nent of both simultaneously by simply turning the screw-rod; and I do hereby declare that the following is a full and complete description of thesame, reference being had to -the accompany? ing drawings, making a part of this specification, in whichq Figure l is a side view of the machine. Figure 2 is a view of the opposite 'side of iig. 1.

Figure 3 isa view of the front end.

Figure 4 is a view. of the top.

Figure 5 is a detached section.V

Like letters of reference refer to like parts in the several views.

A, iig. 3, is a frame transversely, in which is journalled a shaft, B, g. 5, also indicated by the dotted vlilies a,ig. 3.

To said shaft is loosely tted the vibratory standard C in such way as represented in fig. 5, in which it will be seen that the journal-seat and cups D are counter; loosed, linto which are tted bosses or trunnions left upon the sides of the hub of the standard, so that the standard not only vibrates on the shaft, but is also supported by the journal-seat, embracing the trunnions, whereby greater strength and security are obtained to the connection of the standard to the shaft.

In the upper end of the standard is journalled a wheel, E.

A wheel, F', corresponding in diameter to this, is keyed to the end of the shaft B.

' Over these two wheels is strained a belt-saw, F, and by which it is driven.

Secured to the top of the frame A are arcs of a circle, G, in which are out slots H.

In said slots are fitted finger-screws, I, and which are screwed into the standard, thereby holding the same in position.

J, figs. 1 and 2, is a screw, one end of which is screwed into a link, J", attached to the standard, whereas the Y other is secured in a frame, K, and to which is keyed a hand-wheel, L, whereby said screw is operated.

Y It will be observed that there are two pitch of threads on the screw, one much finer than the other, the coarse thread J being fitted in the nut A', whereas the finer threa'd J is screwed into the link J whereby the screw is attached to the standard.

, The nut referred to is screwed into the table B', said table being so arranged that it can slide backward and forward when operated by the wheel and screw.

It be obvious that at the same time the table is being moved, the standard will also be moved in-the same direction, thus" both moving simultaneously, but unequally in their velocity, the standard moving much slower than the table, for the purpose that as the wheel E is at a greater distance from the axial line of vibration than the surface of the table, it would move much faster than the i able if actuated by a screw having the same lead. Hence', in adjusting the saw-for a purpose .hereinafter shown, it would be brought against the side of the slo't in the table through which it runs, if the standard and table were actuated by the same screw, and thereby restrain a free play of the saw, but the screws are so graduated `that the wheel moves at the y same velocity as the table; hence the saw will at all times be free in the slot, as the standard may be moved backward or forward.

Having thus described the construction and arrangement of the machine, the operation of the same is as follows, viz:

The saw, as represented in iig. 1, is perpendicular to I the plane of the table. In this position it will saw the stuff at right angles; but it is often required to saw lumber at various angles forlparticular purposes. In order to do this, it becomes necessary to run one edge of the board upon an inclined rib or cleatraised or cut to the proper angle, thereby elevating thel edge of the board. It will, as a consequence, be sawn at such required angle; but this manner of adjustment is a matter of much trouble and uncertainty, for the reason that if the boards are of unequal width, the angle will be un equal; hence each strip sawn'oif from the board will have a diiferent angle, unless the gauge be adj usted for each piece. v

This difficulty is avoided by the use of my improvement,^for when the position of the saw is once adjusted to the required angle, it will cut each consecutive strip of the same angle, and that without the least variation.

Thus, as above said, the saw is represented as being Y perpendicular to the plane of the table. Y

- Now, in order to cut stuff at any given angle, the position of the same in reference to the table is changed by means ofthe screw, which, as will be evident, will, on turning it in the proper direction, incline the standard either backward or forward, as the case may be, to the required angle, and which, as indicated by the dotted line a', iig. 2, throws the saw forward froma perpendicular to an oblique direction, which may be more or less, as the angle required.

Whatever position the standard is made to assume, it is retained thus by the set-screws I, which, as the standard is adjusted, slide along in the slots H of the arcs G, so that by this means the saw can be readily adjusted to any angle, with the utmost ease and exact ness, without changing the horizontal position of thetable on which the lumber is laid for sawing.

G, iig. 4, is a slide iitted in the table for the purpose I runs, which, if it is moved in either direction greatly, A', on tatie B', link-nut J", hinged to the standard O, will leave a large space open immediately around the carrying saw-pulley E, constructed to operate substansaw, but which may be closed by the insertion of the' tially in the manner described.

Slides. RICHARD ATKINSON.

What I claim as my improvement, and desire to Witnesses: secure by Letters Patent,is- W. H. BURBIDGE,

The arrangement of the screw-rod J and J', lug-nut I E. E. WAITE. 

